Priority gas auctions are now live on Arbitrum One, replacing Timeboost as the transaction ordering policy.
In a nutshell:
Each block runs two short ordering rounds, and within a round transactions are ranked by their priority fee plus a time-based boost.
The design choice I appreciate the most is the boost. Txs that sit in the queue accumulate ordering priority over time without paying more for it, so paying transactions can compete for the front while txs with no tips are still guaranteed to clear.
Best part for devs is that all of this utilizes standard EIP-1559 fields, so integration should be easy!
Arbitrum just got faster.
Introducing Priority Gas Auctions (PGA) and Fast Feed, now live.